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      期中素养练习(含答案)2026-2027学年外研版九年级英语上册

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      期中素养练习(含答案)2026-2027学年外研版九年级英语上册

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      这是一份期中素养练习(含答案)2026-2027学年外研版九年级英语上册,共21页。试卷主要包含了 短对话理解, 长对话理解, 短文理解,信息转换,单项填空,完形填空, 补全对话, 阅读理解等内容,欢迎下载使用。
      第一部分 听力(共四大题,总计20)
      一、 短对话理解(共5小题;每小题1,总计5)
      1. ( )What des the by use his pcket mney fr?
      A. B. C.
      2. ( )What did the by find in Grandma's ld bx?
      A. B. C.
      3. ( ) Hw did the by learn abut the ld palace site?
      A.Frm a TV prgram.
      B.Frm a textbk.
      C.Frm a magazine.
      4. ( )Hw much mney des the by get every mnth?
      A.50 yuan. B.100 yuan.
      C.30 yuan.
      5. ( ) What can visitrs NOT d at the ancient remains?
      A.Take phts. B.Tuch them.
      C.Listen t the guide's intrductin.
      二、 长对话理解(共5小题;每小题1,总计5)
      听下面一段对话,回答第6、7题。
      6. ( ) What percentage f students in the girl's class like reading?
      A. 10%. B. 30%. C. 60%.
      7. ( ) When can mst students in the class d their hbbies?
      A.On weekends.
      B.On weekdays.
      C.During winter hliday.
      听下面一段对话,回答第8至10题。
      8. ( )What des the girl want t buy?
      A.A strybk. B.A ball.
      C.A dictinary.
      9. ( ) Hw des the girl plan t get enugh mney?
      A.By asking parents fr it.
      B.By selling ld strybks.
      C.By ding a part­time jb.
      10. ( )Hw much mney des the girl need?
      A.35 yuan. B.45 yuan. C.55 yuan.
      三、 短文理解(共5小题;每小题1,总计5)
      11. ( )Why d many children in Western cuntries d chres?
      A.T help their parents.
      B.T get mney.
      C.T imprve themselves.
      12. ( )When d the children usually start t d chres?
      A.At the age f ten.
      B.At the age f eleven.
      C.At the age f twelve.
      13. ( ) When d the schl students ften d chres?
      A.On weekdays.
      B.At weekends.
      C.On Mndays.
      14. ( ) What chres can the yung children help their parents t d?
      A.T d the dishes.
      B.T feed the little baby.
      C.T learn new things.
      15. ( ) What can children d with the mney?
      A.They can buy smething they want.
      B.They can g smewhere they want.
      C.They can d smething they like.
      四、信息转换(共5小题;每小题1,总计5)
      第二部分 英语知识运用(共三大题,总计35)
      五、单项填空(共10小题;每小题1,总计10)
      21. ( )— ____ studying, what d yu plan t d during the hliday?
      — I want t learn cking and visit my grandparents.
      A.Besides B.ExceptC.Withut D.Against
      22. ( ) Everyne thught Lily wuld win the English speech cntest but it was s ____—the first place was Tm.
      A.bring B.surprisingC.tiring D.relaxing
      23. ( )— Children's ____ allws them t turn a stick int a magic wand(魔法杖).
      — It's amazing hw they can create a whle new wrld with their minds.
      A.experience B.educatinC.imaginatin D.friendship
      24. ( )—Why did yu stay in the library fr s lng after schl?
      —I wanted t ____ time while waiting fr the rain t stp.
      A.take B. killC.save D.waste
      25. ( )Little Bill was ____ excited and jumped up and dwn immediately when he gt the ty car.
      A.mstly B.hardly C.nearly D.wildly
      26. ( )—Dn't wrry, Mum. I'll make prgress sn.
      —Easier said than dne.____ yu try yur best and never give up.
      A.If B.BecauseC.Until D.Unless
      27. ( )— We need t bk the tickets in advance ____ we wn't miss the cncert.
      — Yu're right. Ppular shws sell ut quickly.
      A.s that B. as sn asC.even if D.as thugh
      28. ( ) —Yur new sprts shes lk nice. Did yu spend a lt f mney?
      — N! They were ____ in the sprts stre, s I nly paid half the price.
      A.in use B.n saleC.under repair D.ut f style
      29. ( )The ancient Silk Rad ____ t cnnect China with Eurpe. Tday, it's still studied as an imprtant part f the wrld histry.
      A.builds B.builtC.was built D.is built
      30. ( )—Please give my regards t yur parents!
      — ____ Thank yu!
      A.Enjy yurself!
      B.I certainly will.
      C.That's all right!
      D.My pleasure.
      六、完形填空(共20小题,每小题1;总计20)
      A
      Peng Jingxuan is a 29-year-ld girl frm Hunan Prvince. A few years ag, she went t France t study music. There, she fund that many yung peple had a great interest in Chinese culture. But they knew almst __31__ abut Chinese musical instruments. This made her think f the guzheng. She started learning it __32__ she was seven and was really gd at it.
      She __33__ t share the beauty f the guzheng with French peple. S in 2018, she __34__ playing the guzheng n the streets f France. Her music was s __35__ that peple lved it at nce. Every time she played it, a lt f peple stpped t listen.
      Peng plays different kinds f sngs. She chses them very __36__. She mixes the __37__ f the guzheng with jazz, rck and ther kinds f music. Many peple enjy sngs with Chinese style. Fr example, they like her guzheng music f Blue and White Prcelain(青花瓷). Sme have even danced t __38__ perfrmances while listening t her music.
      Many f her French fans asked Peng why she chse t play the guzheng in France. “I hpe t __39__ Chinese stries well in my wn way,” Peng Jingxuan said, “My dream is t make mre peple be __40__ the guzheng and knw mre abut traditinal Chinese culture”.
      31. ( )A.smething B.everythingC.nthing D.anything
      32. ( )A.until B.whenC.althugh D.because
      33. ( )A.refused B.agreedC.remembered D.decided
      34. ( )A.stpped B.suggestedC.began D.enjyed
      35. ( )A.wnderful B.usefulC.helpful D.usual
      36. ( )A.quickly B.carefullyC.quietly D.happily
      37. ( )A.shapes B.picturesC.nises D.sunds
      38. ( )A.his B.her C.theirD.ur
      39. ( )A.tell B.read C.hear D.talk
      40. ( )A.interested in B.famus frC.ready fr D. afraid f
      B
      Every mnth, Julia and her cusins wuld g fr the big family meal at their grandparents' huse. On each visit, their grandpa wuld give them a few cins. Then all the children wuld run ff t buy __41__. One day, the grandpa tld the children, “Let's have a cmpetitin t see wh can use the mney __42__. In the last mnth f this year, tell me hw yu've __43__ yur mney.”
      Ruben and Nic, cntinued spending their mney all n sweets. Every time, they wuld __44__ their sweets n the table and shw ff in frnt f the ther children. This made Clara and Je s angry that these tw culd n lnger keep saving their mney. They sn __45__ Ruben and Nic.
      Mnty decided t manage his mney by buying and __46__ things. Sn he made a lt f mney. The way he was ging, he wuld end up almst a __47__ man. Hwever, he began t spend his mney n expensive things. A few mnths later, he had n mney left. Alex saved all the cins he was given, and by the end f the __48__ he had cllected mre mney than anyne else.
      Julia had n mney left but she gt Grandpa's praise (赞扬). In fact, she gave all her cins t a pr vilinist t help imprve his living __49__. In return, he taught her hw t play the vilin. Years later she became a famus vilinist.
      An act f kindness can lead t a great reward (回报). It has __50__t peple in their lives.
      41. ( )A.bksB.tysC.sweets D.clthes
      42. ( )A.carefully B.wiselyC.patiently D.widely
      43. ( )A.used B.givenC.lst D.cllected
      44. ( )A.take ut B.cut utC.put ut D.lay ut
      45. ( )A.left B.jinedC.refused D.chse
      46. ( )A.selling B.brrwingC.saving D.lending
      47. ( )A.clever B.famusC.rich D.prud
      48. ( )A.day B.weekC.mnth D.year
      49. ( )A.cnditins B.intrductinsC.inventins D.cnnectins
      50. ( )A.business B.meaningC.punishmentD.plan
      七、 补全对话(有两项多余)(共5小题;每小题1,总计5)
      A:Gd mrning, Mr. Wang. Thank yu fr agreeing t this interview. 51. ______
      B:Sure. Paper­cutting is a traditinal Chinese art with a histry f ver 1,500 years.
      A:52. ______
      B:It's usually made f red paper. Red is a symbl f happiness in Chinese culture.
      A:53. ______
      B:First, we fld the paper. Then we cut it with special scissrs. Every piece is made by hand.
      A:54. ______
      B:They are used as decratins during festivals, like the Spring Festival and the Mid­Autumn Festival.
      A:That's amazing! 55. ______
      B:Yes, I d. I teach them every weekend. I hpe mre yung peple will lve this art.
      第三部分 阅读(共两节,满分40)
      八、 阅读理解(共20小题;每小题2,总计40)
      A
      Slides (滑梯) are simple but always fun. All yu need t d is climb up t the tp and slide dwn. But did yu knw that there is science behind it?
      56. ( ) What will happen if yu dn't use yur feet at the bttm f the slide accrding t Newtn's first law?
      A.Yu will fly ff the slide.
      B.Yu will slide back up.
      C.Yu will stp immediately.
      D.Yu will stay at the bttm.
      57. ( ) Which picture explains why yu slw dwn a bit when sliding dwn?
      A. B.
      C. D.
      58. ( ) Where can we prbably read the text?
      A.In a strybk.
      B.In a science bk.
      C.In a guidebk.
      D.In a schl pster.
      B
      Hanfu, the traditinal Chinese clthes with a lng histry, is becming mre and mre ppular, especially amng yung peple. Yu can see them wearing Hanfu walking in the streets.
      Sme peple wear Hanfu because it is beautiful and well­made, while sme may be interested in the rich culture behind it. Zhang Zening, a girl frm Nanjing, Jiangsu Prvince, has made mre than 50 sets f Hanfu frm different dynasties. She started t make her wn Hanfu ten years ag because she culdn't buy her favurite style in the market.
      In rder t make Hanfu, she had t visit many places f interest, such as Yngle Palace in Shanxi Prvince, Fahai Temple in Beijing, and Dunhuang in Gansu Prvince. She studied frm the murals (壁画) there. She als studied frm paintings by Tang Bhu frm the Ming Dynasty. She taught herself painting and cstume (服装) designs.
      Making Hanfu is nt easy. It takes abut a mnth t make each Hanfu set. Zhang nw runs the He Lu Hanfu Studi in Nanjing. She said, “Fr me, making Hanfu is nt nly abut making a piece f clthing, but als abut tasting an amazing culture.”
      59. ( )Why d sme peple chse t wear Hanfu?
      ①Because it is finely made.
      ②Because it is beautiful.
      ③Because they are interested in the rich culture behind it.
      ④Because it has a lng histry.
      A.①③④ B.①②④
      C.②③④ D.①②③
      60. ( )What d we knw abut Zhang Zening frm the passage?
      A.She is a girl frm Jiangxi Prvince.
      B.She started t make her wn Hanfu ten years ag.
      C.She never visited Dunhuang in Gansu Prvince.
      D.She spends abut three mnths making each Hanfu set.
      61. ( )Where may yu read this passage?
      A.In a strybk.
      B.In a fashin magazine.
      C.In a science magazine.
      D.On the blackbard f a classrm.
      C
      Kids need t learn abut real mney in a digital age.
      Melanie Zhang wrks in Shanghai, China. Her daughter, 8, is in Grade 2 in a primary schl. When the girl des her maths hmewrk, she ften meets many prblems and asks Zhang fr help. Tday Zhang finds her daughter desn't knw abut paper mney.
      The girl knws abut “yuan”, but has n idea f “jia” and “fen”. Fr her, mney is just numbers n the phnes. That's all her idea abut mney. “Befre ding tday's hmewrk, she didn't see any paper mney.When she started t knw smething, I remember that we always pay nline in daily life,” Zhang says.
      Zhang's daughter desn't knw much abut real mney, and she isn't the nly ne. In a schl f Wuhan, Hubei, the first­grade students dn't knw what renminbi is. They think they can cut paper mney in half when they use it. This surprises their teacher.
      Mney matters in ur daily life, s the ability t use mney is necessary fr children. Where des mney cme and g? Hw can children use mney wisely in life? Every child shuld get t knw these little by little when they are yung. Learning abut real mney, like paper mney and cins, is a gd start.
      62. ( )What d we knw abut Zhang's daughter?
      A.She is nine years ld.
      B.She is nt gd at maths.
      C.She lives in Hubei, China.
      D.She likes shpping nline.
      63. ( )(高阶思维·主旨大意)What's the main idea f Paragraph 4?
      A.Zhang's daughter wants t learn abut mney.
      B.Children tday ften shp nline.
      C.Teachers wrry abut students' maths.
      D.Sme children dn't knw real mney.
      64. ( )Zhang's daughter desn't knw real mney well, because ____.
      A.she has n pcket mney
      B.she desn't knw hw t pay
      C.she seldm sees paper mney
      D.she can't study maths well
      65. ( )What may the writer agree with accrding t the passage?
      A.It's gd fr children t get t knw paper mney.
      B.Parents shuld spend mre time with their children.
      C.Teachers shuld keep students frm smartphnes.
      D.Children must have gd study and life habits.
      D用英语讲好中国故事·长沙马王堆汉墓
      ① Mr. Brwn is a traveler. He is a fan f Chinese culture and has been t many places in China. This March, he visited Mawangdui in Changsha, Hunan. The tmbs f the Western Han Dynasty greatly impressed him (令他印象深刻). “They're full f great treasures. They shw the life 2,000 years ag in different ways,” he said.
      ② Mr. Brwn first enjyed the beautiful clthes frm Mawangdui. There are hundreds f them. He liked a sha gwn (纱衣) mst. Weighing 49 g, it's the earliest and thinnest dress in the wrld. “Even with mdern technlgy, it's impssible t make such a thin dress. Hw amazing!” Mr. Brwn said.
      ③Later he went t see the ancient bks. Quite a few bks were fund in the tmb. They recrded the ancient peple's knwledge (知识) f medicine, space and many ther things. Mr. Brwn felt sad t see that many pages were brken. Hwever, when he knew that the wrkers were trying their best t repair the bks, he felt happy abut it.
      ④ Mr. Brwn als saw sme Chinese musical instruments, like se and qin. He had never seen them befre. “Believe it r nt, I saw a band! I kept imagining what beautiful music they made. Ancient Chinese peple really enjyed themselves,” Mr. Brwn said excitedly.
      66. ( )Mr. Brwn went t Changsha in ________ this year.
      A.March B.April C.May D.June
      67. ( )(高阶思维·推理判断)What can we infer (推断) frm the passage?
      A.Peple nwadays can make the same sha gwn.
      B.Much can be learned frm the bks in the tmb.
      C.A band is always playing beautiful music in the tmb.
      D.The cultural relics frm Mawangdui reflect the prsperity f Eastern Han Dynasty.
      68. ( )Which is the right structure f the passage?
      A. B. C. D.
      E
      Every Saturday evening, many peple cme t an pen square in a small twn in Xi'an. They want t watch Chen Kun and his friends put n a play. During the play, the audience (观众) can hear them, but they can't see them. That is because they are putting n a shadw puppet play.
      Shadw puppets are made f hard leather (皮革). The leather is cut ut in the shape f a persn, an animal r an bject. Each puppet is painted in bright clrs and put n a stick. Sme puppets have mvable arms and legs.
      During a shadw puppet play, Chen stands behind a white screen with lights behind it. The audience sit in frnt f the screen. Chen and his friends hld the puppets very clse t the screen s the audience can see the puppets' shadws clearly. Then they mve the puppets arund and d the vices f the different characters.
      Shadw puppet plays are a traditinal Chinese art. Nw with TV and films, shadw puppet plays are nt as ppular as befre. T encurage mre yung peple t learn the skills f shadw puppet plays, Chen prvides training curses fr students t teach them hw t make shadw puppets.
      Chen and his friends ften wrk very hard fr little mney, but they d nt mind. They want t keep this traditinal art frm alive.
      69. ( )Accrding t the passage, what are shadw puppets mainly made f?
      A.Leather. B.Sticks.
      C.Plastic. D.Paper.
      70. ( )Why d Chen Kun and his friends put n shadw puppet plays?
      A.Because they want t enjy themselves.
      B.Because they want t make as much mney as they can.
      C.Because they want t keep this traditinal art frm alive.
      D.Because shadw puppet plays are mre ppular than befre.
      71. ( )(高阶思维·观点态度)Which f the fllwing wrds can describe shadw puppet plays?
      A.Ppular. B.Traditinal.
      C.Easy. D.Internatinal.
      72. ( )(高阶思维·标题归纳)What's the best title fr the text?
      A.The Making f Shadw Puppets
      B.The Histry f Chinese Shadw Play
      C.Hw t Put n a Shadw Play
      D.Shadw Play—A Traditinal Chinese Art
      F
      第二节
      Have yu ever visited a histry museum? Near Chengdu, China, there is a special museum called Sanxingdui. It hlds ancient treasures frm ver 3,000 years ag. These artifacts (古器物) change what we knw abut China's past.
      Inside the museum, yu will see amazing things. There is a very tall brnze statue with big eyes and large ears. Glden masks are s thin that they lk like they culd flat. The mst interesting piece is a brnze tree with birds and dragns n its branches. Lng ag, peple might have believed this tree cnnected heaven (天堂) and earth.
      Sanxingdui is full f mysteries. Scientists fund these bjects in 1986, but there are n writings t tell us abut the peple wh made them. Wh were they? Why did they disappear? When yu visit, yu can try t slve these puzzles yurself.
      The museum building lks mdern. If yu want t learn mre abut the ancient culture, yu can use screens t see the artifacts clsely. There is als a VR rm that shws what life might have been like in this ancient culture.
      Sanxingdui teaches us that histry still has many secrets.The mre we learn, the mre questins we have. Maybe the ancient peple wanted us t keep wndering abut them.
      73. Where is the Sanxingdui Museum? (不超过5个词)
      _____________________________________________________________
      74. What des the tall brnze statue lk like? (不超过10个词)
      ____________________________________________________________
      75.(高阶思维·开放)If yu culd visit the Sanxingdui Museum, what wuld yu like t d there? Why? (不超过20个词)
      _________________________________________________________________________________________________________________________________
      第四部分 写(共两大题,总计25)
      九、单词拼写(共5小题;每小题1,总计5)
      76. Time is ne f the mst v________(珍贵的) things in ur life.Dn't waste it.
      77. She thinks her success is nt just due t l________(运气) but t years f hard wrk.
      78. I dn't knw e________(精确地) hw t translate this ancient pem int English.
      79. After several tries, Xia Hng m________(设法)t make a perfect paper lantern by herself.
      80. A sudden rainstrm during the PE class s________(使惊恐)the students wh didn't bring umbrellas.
      十、书面表达(共1小题;总计20)
      学校正举办主题为“My Pcket Mney”的英语征文活动,请你根据下面的要点提示写一篇短文谈谈中学生如何使用自己的零花钱。
      要点:1. Shuld students have pcket mney? Why r why nt? 2. Hw d yu spend yur pcket mney? 3. Hw d yu manage yur pcket mney?
      要求:1. 必须包括提示中的所有信息,并按要求适当发挥;2. 词数80左右。
      ________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

      答案
      一、短对话理解
      你将听到五段对话,每段对话后有一个小题。请在每小题所给的A、B、C三个选项中选出一个最佳选项。每段对话读两遍。
      1. W:Hw d yu usually use yur pcket mney?
      M:I always use it t buy bks.
      2. W:What did yu find in the ld bx frm yur grandma?
      M:A set f ld stamps. They are frm her teenage years and full f memries.
      3. W:Hw d yu knw s much abut the ld palace site?
      M:I watched a TV prgram abut it last night. It tld many interesting stries.
      4. W:My parents give me 30 yuan every week. What abut yu?
      M:I get 50 yuan.
      5. W:Are there any rules fr visiting the ancient site?
      M:Yes. Visitrs can take phts f the ld buildings and listen t the guide, but they can't tuch the cultural relics.
      二、长对话理解
      你将听到两段对话,每段对话后有几个小题。请在每小题所给的A、B、C三个选项中选出一个最佳选项。每段对话读两遍。
      Text 1
      W:I did a survey abut teenagers tday's hbbies in my class.
      M:What did yu find ut?
      W:60% f the students like playing ball games, and 30% like reading. Only 10% like drawing.
      M:That's interesting. D they have time fr hbbies?
      W:Mst f them say they can nly d hbbies n weekends because they have classes n weekdays.
      M:That's a pity. Teenagers need t have mre time fr their hbbies.
      Text 2
      W:I want t buy a new dictinary, but I have n mney.
      M:Why nt ask yur parents fr sme pcket mney?
      W:I dn't want t. I want t get it by myself.
      M:Hw?
      W:I plan t sell my ld strybks in the schl yard this weekend.
      M:That's a gd idea. Hw much d yu need fr the dictinary?
      W:It's 45 yuan. I hpe I can get enugh mney frm selling the bks.
      M:I think yu can. I will cme t buy ne f yur bks.
      三、短文理解
      你将听到一篇短文,短文后有五个小题。请根据短文内容,在每小题所给的A、B、C三个选项中选出一个最佳选项。短文读两遍。
      In sme Western cuntries, many children ften d chres t get pcket mney. They usually start t d this at the age f ten.
      Schl students have t d their hmewrk. S they dn't have much free time n weekdays. They d the chres n weekends.
      Yung children can help wash the dishes, clean the flr r feed the pet dg. In this way, they can earn sme mney and buy smething they want. And ding chres can help the parents, and it is als a gd way fr children t learn new things. Fr example, they can learn hw t ck. Of curse, their parents help them first.
      四、信息转换
      你将听到一篇短文。请根据短文内容,写出表格中所缺单词,每空仅填一词。短文读两遍。
      Here is a shrt intrductin t three histrical remains in ur city.
      First, the Old Twn is in the nrthwest f ur city. It was built during the Tang Dynasty, and visitrs can see ld stne huses there. Secnd, the Temple is near a muntain village. It has a histry f ver 800 years and was nce a ppular place fr lcal peple t pray. Third, the Frt Site is n a small hill. It was built t prtect the villages arund it frm danger. The temple was repaired in the 19th century, and nw all three sites are pen t the public fr free every weekend.
      第一部分 听力
      一、1~5: CAAAB
      二、6~10: BACBB
      三、11~15: BABAA
      四、16. nrthwest 17. stne 18. muntain 19. 800
      20. weekend
      第二部分 英语知识运用
      五、21~25: ABCBD 26~30: DABCB
      六、A)31~35: CBDCA 36~40: BDBAA
      B)41~45: CBADB 46~50: ACDAB
      七、51~55: GCADF
      第三部分 阅读
      八、A)56~58: ABB B)59~61: DBB
      C)62~65: BDCA D)66~68: ABA
      E)69~72: ACBD
      F)73. Near Chengdu, China.
      74. It has big eyes and large ears.
      75. I wuld try the VR rm. Because it shws ancient peple's lives, helping me understand the mysteries better.(开放性问题,答案合理即可。)
      第四部分 写
      九、76. valuable 77. luck 78. exactly 79. managed
      80. scared
      十、One pssible versin:
      I think students shuld have sme pcket mney because smetimes we need t buy sme necessities and develp the skill f managing things as well. Usually I spend my pcket mney n snacks. Schl things als cst mney. Besides, I ften buy my favurite things such as bks r CDs.
      In my pinin, it is really imprtant t make better use f the mney. Abve all, making plans is a gd chice. In this way, I can think abut hw I spend the mney prperly. Secndly, it is necessary t save sme mney. Yu dn't knw when yu need mney. If peple need help, we will try t give them a hand.
      Three histrical remains
      Old
      Twn
      In the 16. ______
      f ur city
      △Built during the Tang Dynasty
      △Visitrs can see ld 17. ______ huses there
      Temple
      Near a 18. ______
      village
      △ Has a histry f ver 19. ______ years
      △ Repaired in the 19th century
      Frt(堡垒)
      Site
      On a small hill
      △ Used t prtect the villages arund it
      Open t the public fr free every 20. ______.
      A.Hw is paper­cutting made?
      B.Where is paper­cutting frm?
      C.What is paper­cutting made f?
      D.What is paper­cutting used fr?
      E.Is paper­cutting ppular all ver the wrld?
      F.D yu teach paper­cutting t yung peple?
      G.Can yu tell me smething abut paper­cutting?
      D Yu Like Science?
      Newtn said what ges up must cme dwn. He was talking abut gravity (重力). Slides wrk because f gravity. But that is nt all.
      ① Yu climb up the slide and sit dwn.
      Yu are ready t g. Are yu sliding dwn? N, nt yet. Things stay still (静止的) unless smething makes them mve. It is Newtn's first law. S yu have t give yurself a push t start the jurney dwn.
      ② Nw yu are sliding dwn.
      D yu feel yu are slwing dwn a bit? When tw things rub (摩擦) against each ther, they cause frictin (摩擦力). Withut frictin, yu will slide dwn faster and faster t the bttm.
      ③ At the bttm f the slide, yu cme t a full stp.
      Yur feet tuch the grund and add extra (额外的) frictin. Newtn's first law als says mving things keep mving unless smething makes them stp. S, if yu d nt use yur feet, yu'll fly ff the slide.

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